Telautograph.



No. 668,892. Patented Feb. 26, I901;

' a. s. TIFFANY.

TELAUTOGRAPH.

(Application filed Dec. 20, 1900.)

(No Model.)

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GEORGE s. TIFFANY, or BROOKLYN, NEW YORK, AssiGNoRTo THE GRAY NATIONAL TELAUTOGRAPH COMPANY, OF new YORK, N. Y.

TELAUTOGRAPH.

SPECIFICATION forming part of Letters Patent No. 668,892, dated February 26, 1901. Application filed December 20,1900- Serial No. 40,472. (No model.)

To all whont it ntcy concern:

instrument. as is necessary for an understand- Be it known that I, GEORGE S. TIFFANY, a

ing of the present invention.

citizen of the United States, residing in the In said drawing, B represents the transborough of Brooklyn, county of Kings, and mitting-tracer,(usuallyapencil,)whichiscar- 5 State of New York, have invented certain l ried by a pair of hinged arms 2 8, pivoted new and useful Improvements in Telautoeccentrically to a pair of arms 4: 5, connected,

graphsfiully described and represented in the respectively, to left and right hand main-line following specification and the accompanying wires a b, leading to a suitable receiving indrawing, forming a part of the same. strument-such, for example, as that illus- 10 This invention relates to improvements in t trated in Figure 2 of my applications before telautographic apparatus, and particularly to referred to. As the transmitting-tracer B is tel-autographic apparatus of that class in moved in writing the arms 4: 5 are rotated which the movements of the receiving-pen in thereby, and as the latter are thus rotated unison with the transmitting-tracer are efthey effect, through means which will presi5 fected by variations in the strength of the ently be described, variations in the strength current sent over line from the transmitting of the currents sent over the main-line wires instrument to the receiving instrument, such a b. variations in current strength being in turn Current is supplied to the main-line wires effected by and corresponding to the movea b from two local circuits at the transmit- 7o 20 ments of the transniittirig-tracer. ting station which are independent of the In two applications filed by me October 19, main-line circuits a b and which include a 1900, Serial Nos. 33,589 and 83,590, is shown source of electric energy, as a battery H and and described at length a tel-autographic aptwo plates 1 1, preferably arc-shaped, from paratus containing for each of the main-line which current is shunted into the left and 25 circuits an independent circuit including a right hand main-line circuits a b, respecsource of electric energy from which current tively, from said independentcircuits. These is supplied to the main-line circuit and also arc'shaped plates I I are located beneath the means controlled by the transmitting-tracer path of movement of the rotary arms a 5, so whereby the current so supplied to said mainas to be engaged by contacts, preferably roll- 0 line circuit is varied in strength during the ers 15, carried by said arms, to which they writing operation according to the movements are secured by springs, which press them of the transmitting-tracer,such currents of vaagainst the peripheries of platesl I. Through rying strength through suitable devices at the these contacts 15 and arms 4 5 currents are receiving instrument causing the receivingshunted from the independent circuits into pen to move in unison with and to reproduce the maii'i-linecircuits a b,respectively,which the writing or other matter traced by the varyin strength according to the positions of transmittirig-tracer. these contacts or rollers between the termi- The present invention has especial refernals t" i of said plates 1 I, as will presently ence to telautographic apparatus of this type, appear. he arc shaped plates 1 I are of 0 40 the improvements of the present invention carbon, and the contacts 15 are also preferrelating particularly to means controlled by ably of carbon, so as to reduce the tendency the transmitting-tracer for so varying the to oxidation, and while the contacts 15 may strength of the currents supplied to the mainbe of other forms it is preferable that they line circuits. The means provided for this be in the form of rollers pivoted in arms 15, 45 purpose by the present invention may be used as shown, so as to make rolling contact with in conjunction with any suitable devices at t the plates I and I.

the receivinginstrument-such, for example, The independent current supplying ciras the movable coils shown and described in cuits above referred to will now be described, my aforesaid applications. with the master-switch D in the position in 50 In the accompanying drawingis illustrated, which it is shown, which is the position it ocpartly in diagram, so much of a transmitting cupies when the transmitting-tracer is hung up, and the transmitting and receiving instruments out of circuit. When the masterswitch is moved, however, in the direction of the arrow, the negative pole of the battery H will be connected by wire 72, contactbrush l6, contact-plate 17 on the master-switch, andwires h 77, to the terminals 1," of the areshaped plates I I, while the positive pole of the battery H will be connected by Wire 72, contact-brush l6,contact--plate 17 on the master-switch D, and wires hf h to the opposite terminals 2' of the arc-shaped plates II. The positive pole of the battery H is grounded at G when master-switch D is moved to the position stated by wire h", connected to contactspring 18, (contacting with plate 17,) brush 16, and wire its, so that with the parts in such position a current is passed through each of these independent circuits'from the negative pole of the battery H and through the plates I I, rollers 15, springs 15*, arms 4 5, wires a 17 contact-plates 13 13 and brushes 14 14 to the main-line circuits at? b, respectively, leading to the receiving instrument, which, as before stated, may be the receiving instrument shown and described in my said prior applications or any other suitable receiving instru men t. The strength ofthe currents dethese independent circuits to circuits will, as before stated, upon the positions of the roll-,

ers 15 relatively to the opposite terminals 2'" t of the arc-shaped plates II, since the nearer these rollers are to the terminals 2" of said plates the greater the voltage between said rollers and the opposite terminals 11 of said plates orground, and vice versa; or, in other words, if we assume the voltage of the battery H to be thirty volts and a roller 15 to be one-third the distance from the terminal 2' of the plate I or I the difierence of potential between the roller 15 and ground will be approximately ten volts, and if said roller be midway between the terminals 2"11 of said plate I or I the difference of potential be tween the roller and ground will be approximately fifteen volts. From this construction it results that as the arms 4 5 are rotated by the movement of the transmitting-tracer B the rollers 15 are caused to assume different positions relatively to the terminals 2" 2' of the plates I I and to shunt into the main-line circuits a b currents which vary in strength in accordance with the positions thus assumed by the rollers 15, and consequently in accordance with thepositions assumed by the transmitting-tracer, the strength of the currents increasing as the rollers 15 approach the terminals z" of the arc-shaped plates and decreasing as they approach the terminals 2' thereof.

Of course it will be understood'that in the receiving instrument, which may be connected with the transmitting instrument shown, the pen-arms of such receivinginstrument instead of being connected to pen-arm drums, as in my prior applications, before referred to, will be connected, respectively, to devices said independent like the arms 4 5, so that the angular movements of the receiving-pen will be the same as those of the transmitting-tracer.

What I claim is- 1. In a tclautographic apparatus, the cornbination of a trans1nitting-tracer, a main-line circuit, an independent circuit including a source of electric energy, two relatively movable members, one included in the independent circuit and through which current is supplied to the main-line circuit, and the other leading tracer and one of said members whereby the latter is moved relatively to the other member so as to shunt from said independentcir- .cuit into the main-line circuit currents var ing in strength according to the movements of said transmitting-tracer, one of said members being of carbon, substantially as de scribed.

2. In a telautographic apparatus, the combination of a transmitting-tracer, a main-line circuit, an independent circuit including a source of electric energ two relatively movable members, one included in the independent circuit and through which current is supplied to the main-line circuit, and the other leading therefrom to the main-line circuit, and connections between the transmittingtracer and one of said members whereby the latter is moved relatively to the other member so as to shunt from said independent circuit into the main-line circuit currents varying in strength according to the movements of said transmitting-tracer, both of said members being of carbon, substantially as described.

3. In a telautographic apparatus, the combination of a transmittirig-tracer, a main-line circuit, an independent circuit including a source of electric energ Y and a member through which current is supplied therefrom to the main-line circuit, a movable member in contact therewith and connected with the main-line circuit, and connections between the transmitting-tracer and said movable member whereby the latter is moved relatively to the other member so as to shunt from circuit into the main-line circuit currents varying in strength according to the movements of said transmittingtracer, one of said members being of carbon, substantially 4. In a telautographic apparatus, the combination of a transmitting-tracer, a main-line circuit, an independent circuit including a source of electric energ Y and a member through which current is supplied therefrom to the main-line circuit, a movable member in contact therewith and connected with the main-line circuit, and connections between the transmitting-tracer and said movable member whereby the latter is moved relati vely to the other member so as to shunt from said independent circuit into the main-line circuit currents varying in strength according to the movements of said transmittingtracer, both of said members being of carbon, substantially as described.

5. In a telautographic apparatus, the combination of a transmitting-tracer, a main-line circuit, an independent circuit including a source of electric energy and an arc-shaped member through which current is supplied to the main-line circuit, a member in contact with said arc-shaped member and connected with the main-line circuit, one of said members being rotatable relatively to the other, and connections between the transmittingtracer and the rotatable member whereby thelatter is moved relatively to the other member so as to shunt from said independent circuit into the main-line circuit currents varyingin strength according to the movements of said transmitting-tracer,one of said members being of carbon, substantially as described.

6. In a tel-autographic apparatus, the combination of a transmitting-tracer, a main-line circuit, an independent circuit including a source of electric energy and an arc-shaped member through which current is supplied to the main-line circuit, a member in contact with said arc-shaped member and connected with the main-line circuit, one of said members being rotatable relatively to the other, and connections between the transmittingtracer and the rotatable member whereby the latter is moved relatively to the other member so to shunt from said independent circuit into the main-line circuit currents varying in strength according to the movements of said transmitting-tracer, both of said members being of carbon, substantially as described.

7. In a telautographic apparatus, the combination of a transmitting-tracer, a main-line circuit, an independent circuit including a source of electric energy and an arc-shaped member through which current is supplied to the main-line circuit, a rotatable member in contact with said arc-shaped member and leading therefrom to the main-line circuit, and connections between the transmittingtracer and said rotatable member whereby the latter is moved relatively to the other member so as to shunt from said independent circuit into the main-line circuit currents varying in strength according to the movements of the transmitting-tracer, one of said members being of carbon, substantially as described.

8. In a tel-autographic apparatus, the combination of a transmittingtracer, a main-line circuit, an independent circuit including a source of electric energy and an arc-shaped member through which current is supplied to the main-line circuit, a rotatable member in contact with said arc-shaped member and leading therefrom to the main line circuit, and connections between the transmittingtracer and said rotatable member whereby the latter is moved relatively to the other member so as to shunt from said independent circuit into the main-line circuit currents varying in strength according to the movements of the transmitting-tracer, both of said members being of carbon, substantially as described.

9. In a tel-autographic apparatus, the combination of a transmittiugtracer, a main-line circuit, an independent circuit including a source of electric energy and an arc-shaped member through which current is supplied to the main-line circuit, a rotatable member bearing a roller in contact with said arcshaped member and leading therefrom to the main-line circuit, and connections between the transmitting-tracer and said rotatable member whereby the latter is moved relatively to the other member soas to shunt from said independent circuit into the mainline circuit currents varying in strength according to the movements of the transmitting-tracer, one of said members being of carbon, substantially as described.

10. In a telautographic apparatus, the combination of a transmitting-tracer, a main-line circuit, an independent circuit including a source of electric energy and an arc-shaped member through which current is supplied to the mainline circuit, a rotatable member bearing a roller in contact with said areshaped member and leading therefrom to the main-line circuit, and connections between the transmitting-tracer and said rotatable member whereby the latter is moved relatively to the other member so as to shunt from said independent circuit into the mainline circuit currents varying in strength according to the movements of the transmitting-tracer,both of said members being of carbon, substantially as described.

11. In a telautographic apparatus, the combination of a transmitting-tracer, a main-line circuit, an independent circuit including a source of electric energy,'two relatively movable members, one included in the independent circuit and through which current is supplied to the main-line circuit, and the other leading therefrom to the main-line circuit, and connections between the transmittingtracer and one of said members whereby the latter is moved relatively to the other member so as to shunt from said independent circuitinto the main-line circuit currents varying in strength according to the movements of said transmitting-tracer, one of said members being pivoted in a suitable support so as to make rolling contact with the other, substantially as described.

12. In a telautographic apparatus, the combination of a transmitting-tracer, a main-line circuit, an independent circuit including a source of electric energy and an arc-shaped member through which current is supplied to the main-line circuits, a rotatable member bearinga rollerin contact with said arc-shaped member and leading therefrom to the mainline circuit, and connections between the transmitting-tracer and said rotatable memioo ber whereby the latter is moved relatively to my hand in the presence of two subscribing the other member so as to shunt from said witnesses.

independent circuit into the main-line circuit currents varying in strength according to the GEORGE TIFFANY" 5 movements of the transmitting-tracer, sub- Witnesses:

stantially as described. T. F. KEHOE,

In testimony whereof I have hereunto set S. WINTHAL. 

